• KAGRA
• Commissioning
• DailyWork
• 2019-03-13

2019/3/13(Wed.)

Schedule

• Center

  • 2/26-27: Venting

  • 2/28-3/15: Health check and maintenance for VIS

    • PRM: One flag was dropped. -> leave it

    • 3/6 PR3: range -> incline by 20-30mrad at mirror because of bistable.

    • 3/4-8 PRM: Misalignment does not reach where beam hits damper.

    • ~3/15 BS: Yaw offset adjustment by hand. -> 3/5-6

      • 3/12: BS ok

  • 3/5 afternoon or 3/6 morning: Coolers for ITMs will be stopped for 2-3 hours to change water.

  • 3/18-19: Re-alignment
  • 3/19: Closing
  • 3/20: pump down
• Yend

  • 1/25-2/20: Yend Pcal finalization

  • 3/5: EYA remaining works by Enomoto, Inoue.

  • 2/25-3/5: Yend WAB finalization

  • 3/6: Y end closing (no laser hazard at least in the morning)

  • 3/7: Y end pump down

    • 3/7,8: leak test

• Xend

  • 2/11-2/14: Xend NAB installation

  • 2/21: Removing FC, Payload release

    • 2/27: ETMX release

  • 2/23-3/6: Xend Pcal finalization 1

    • Periscope installation

    • 3/6: Beam position by IR and Green

  • 3/5 AOS: EY and EX(if they have time) work.

  • 3/6: Green X alignment (no IR), and no hazard at Y end.

  • 3/11, 18,19: Xend WAB finalization.

  • 3/11~3/12: ETMX tuning.

  • 3/19: Heatlink etc.
  • 3/19: ETMX finalization by Takahashi
  • 3/18,19: ETMX alignement
  • 3/21 closing
  • 3/22 Pumping down
    • Leak test
• 3/18~ : Night work starts, daily meeting will be moved to 1PM
  • Summary of work will last for a while in the morning meeting.
• 2/18-2/22: PRMI commissioning
• 3/25~?: DRMI commissioning
• 3/25-4/19: Y arm commissioning
• 3/25-4/19: FPMI commissioning

Note

• Night work does not start from 3/11 due to the 2weeks delay by VIS troubles.
  • It does not mean that night work is prohibited but it means that officially night shift responsible person won't be assigned and we have no daily meeting at 1pm.
  • Official night work starts 3/18 or 3/25, but not determined yet.

Weekend

Report of work

• Type A:
  • ETMX yaw position was adjusted and upper tower ETMX seems to be fine. Oplev is off from the center and it means that cryo payload may be touching something. Tomaru-kun will check it today.
  • ETMX TF function measurement showed that LVDT gain was too low.
  • ETMY: f3 was stuck.
  • ITMX: It was turned out that BF was not cooled down.
• Type B:
  • BS was recovered and chamber was closed. Health check showed that mechanically everything was OK.
  • Alignment of BS to REFL using ITMY was done.
  • SR2 seems to be OK, but oplev shows something wrong. Will open chamber.
  • SR3 is OK.
• Type Bp:
  • PRM needs more work.

Work plan

• CAL: will measure TF of circuits at ETMX.